# 作   者：要努力，努力，再努力
# 开发日期：2022/4/23 14:32

class Student:
    def __init__(self, name, age):
        self.name = name
        self.age = age

    def eat(self):
        print(self.name + '在吃饭')


stu1 = Student('张珊', 20)
stu2 = Student('李四', 30)

print(id(stu1), id(stu2))

print('-------------------动态绑定属性----------------------')
stu2.gender = '女'
print(stu1.name, stu1.age)
# print(stu1.name, stu1.age, stu1.gender)  #  AttributeError: 'Student' object has no attribute 'gender'
print(stu2.name, stu2.age, stu2.gender)

print('--------------------------------------')
stu1.eat()
stu2.eat()


def show():
    print('定义在类之外，是函数')


print('-------------------动态绑定方法----------------------')
stu1.show = show
stu1.show()

# stu2.show()  # AttributeError: 'Student' object has no attribute 'show'


